Pro&Con: Using Google's Public DNS as 'default' forwarders

Hello Experts,

in a recent answer here on EE an Expert said this: should be considered really more or less a kind of test DNS server.

I have to admit I never gave it much thought and implementing Google's Public DNS as a common practice since a few years, hence I replied: and point to the load balancers of Google's public DNS. Since these are in truth not a SOA for any domain (and never will be by design). I think of them as perfect forwarders since they will only forward themself. They are also pingable and - as most of the things operated by Google - near perfectly reliable. The DNS servers from my ISPs are not nearly as fast and available. See Google's statement

What are your thoughts?
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Daniel HelgenbergerAsked:
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personally I like to stick with the "nearest" DNS which would be the ISP, as this reduces the number of hops to do a lookup - and people like to see a webpage START loading quickly.

However, there is no guarantee that they are going to process the request any quicker. I have also had problems with an ISP caching an incorrect entry for far too long - but this could happen with anyone - at least with the ISP I can ring them and point out the issue - something I would expect very difficult with google.

As to security? Smaller target vs better security?
If you want to find DNS servers that are fast for you, check out Seve Gibson's free DNS Benchmark tool. Your ISPs servers might not be a good choice. I personally use the OpenDNS  servers because of the filtering they do.

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Also, google will track your requests.  That's a for-sure!

- gurutc
I must say - thanks kevinhsieh - that dns benchmark app is cool - I just ran it on a few of my clients servers to test dns performance and make sure they are using a fast forwarder - in Australia I found that Telstra seems to have the best performing DNS for non-cached requests - while the dns of the actual ISP wins for cached requests (as you should expect).
Daniel HelgenbergerAuthor Commented:
Thank you guys for your Input on that, esp. kevinhsieh for the benchmark-tool! Enabled me to find out my best performing DNS.
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